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RSS2011 Vol. 23, No. 11
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2011,
23.
Abstract:
Male Babl/c mouses were exposed to 0.625 mW/cm2 and 1.25 mW/cm2 2856 MHz microwaves for 30 min×2 times. Venous blood samples were collected at 1 h,1 d,3 d，7 d,15 d and 30 d after exposure and differential counting of blood cells were performed． Immed...
Male Babl/c mouses were exposed to 0.625 mW/cm2 and 1.25 mW/cm2 2856 MHz microwaves for 30 min×2 times. Venous blood samples were collected at 1 h,1 d,3 d，7 d,15 d and 30 d after exposure and differential counting of blood cells were performed． Immed...
2011,
23.
Abstract:
The radiation generated in the process that the intense electron beam accelerator is running with pseudo load can lead to the black screen of the nearby computer and oscillograph. In this study, the research using experiment method is carried out on ...
The radiation generated in the process that the intense electron beam accelerator is running with pseudo load can lead to the black screen of the nearby computer and oscillograph. In this study, the research using experiment method is carried out on ...
2011,
23.
Abstract:
The paper analyzes the high voltage rectangle pulse generator with a Marx generator and a LC circuit in theory, and designs a pulse generator of this kind. The Marx generator is constituted of sixteen 100 kV, 400 nF capacitors, with a pre-triggered S...
The paper analyzes the high voltage rectangle pulse generator with a Marx generator and a LC circuit in theory, and designs a pulse generator of this kind. The Marx generator is constituted of sixteen 100 kV, 400 nF capacitors, with a pre-triggered S...
2011,
23: 1-5.
Abstract:
The proliferation changes of IAR20 and L-02 cells induced by 9.33 GHz high power pulse microwave(HPPM) have been investigated by MTT assay. The relations between HPPM parameters(pulse number, field intensity and pulse width) and cell proliferation ar...
The proliferation changes of IAR20 and L-02 cells induced by 9.33 GHz high power pulse microwave(HPPM) have been investigated by MTT assay. The relations between HPPM parameters(pulse number, field intensity and pulse width) and cell proliferation ar...
2011,
23: 2855- .
doi: 10.3788/HPLPB20112311.2855
Abstract:
With the analog to digital converter of three inverters, theoretical analysis and injection experiment of microwave effects are carried out on circuit unit level. The core chip of the circuit is 74HC04 or 74LVCU04A inverter. The latch process of the ...
With the analog to digital converter of three inverters, theoretical analysis and injection experiment of microwave effects are carried out on circuit unit level. The core chip of the circuit is 74HC04 or 74LVCU04A inverter. The latch process of the ...
2011,
23.
Abstract:
Our laboratory has developed a two-dimensional semiconductor device simulator to analyze the burnout mechanism of semiconductor devices with high power microwave injection. In this paper, the simulator is further developed to include the SPICE model ...
Our laboratory has developed a two-dimensional semiconductor device simulator to analyze the burnout mechanism of semiconductor devices with high power microwave injection. In this paper, the simulator is further developed to include the SPICE model ...
2011,
23.
Abstract:
Single-ended mixers were designed and made with ADS software. A set of mixers of different damage levels were then obtained after effects experiments of microwave injection. By measuring diode volt-ampere characteristics and analyzing failure mechani...
Single-ended mixers were designed and made with ADS software. A set of mixers of different damage levels were then obtained after effects experiments of microwave injection. By measuring diode volt-ampere characteristics and analyzing failure mechani...
2011,
23.
Abstract:
This paper studies low noise amplifier (LNA) failures under intentional electromagnetic environment (IEME) through SPICE simulation and direct injection experiment. The classic single-stage studied has strong gain suppression effects when superimpose...
This paper studies low noise amplifier (LNA) failures under intentional electromagnetic environment (IEME) through SPICE simulation and direct injection experiment. The classic single-stage studied has strong gain suppression effects when superimpose...
2011,
23.
Abstract:
The paper presents a high power bipolar pulse forming line based on Blumlein line and peaking-chopping(P-C) switch, and studies its operating principles. A high power bipolar pulse forming line is designed accordingly, and high voltage experiments ab...
The paper presents a high power bipolar pulse forming line based on Blumlein line and peaking-chopping(P-C) switch, and studies its operating principles. A high power bipolar pulse forming line is designed accordingly, and high voltage experiments ab...
2011,
23.
Abstract:
A kind of coaxial capacitor with low-inductance, high-current conducting ability and long-life is investigated. Considering its voltage, inductance, ability of conducting current and connecting manner with switch, the paper theoretically determines t...
A kind of coaxial capacitor with low-inductance, high-current conducting ability and long-life is investigated. Considering its voltage, inductance, ability of conducting current and connecting manner with switch, the paper theoretically determines t...
2011,
23.
Abstract:
The primary objective of this article is to research the effect of pulsed discharge spark resistance on output pulse front edge of gas spark switch. The analysis on characteristics of spark discharge resistance is an important foundation to study swi...
The primary objective of this article is to research the effect of pulsed discharge spark resistance on output pulse front edge of gas spark switch. The analysis on characteristics of spark discharge resistance is an important foundation to study swi...
2011,
23.
Abstract:
Two kinds of convolution methods were designed to optimize the output characteristics of rolled strip pulse forming line(RSPFL). Simulation results show that convolution methods influence the electromagnetic field distribution in the RSPFL, especiall...
Two kinds of convolution methods were designed to optimize the output characteristics of rolled strip pulse forming line(RSPFL). Simulation results show that convolution methods influence the electromagnetic field distribution in the RSPFL, especiall...
2011,
23.
Abstract:
In order to solve the electromagnetic interference among multi-loaded lines in series when the Tesla-PFN(pulse forming network) long pulse power generator operates under high voltage, the structure of the annular loaded lines in series is optimized a...
In order to solve the electromagnetic interference among multi-loaded lines in series when the Tesla-PFN(pulse forming network) long pulse power generator operates under high voltage, the structure of the annular loaded lines in series is optimized a...
2011,
23.
Abstract:
One double-channel output structure of spiral PFL(pulse forming line) with an outer shield and an inner cylinder is presented. This kind of spiral PFL comprises a high-coupling Tesla transformer with built-in ferromagnetic material as the inner and t...
One double-channel output structure of spiral PFL(pulse forming line) with an outer shield and an inner cylinder is presented. This kind of spiral PFL comprises a high-coupling Tesla transformer with built-in ferromagnetic material as the inner and t...
2011,
23.
Abstract:
The solid-state pulsed power device is a new development trend of pulsed power technology. This paper reports the development of the solid-state pulse forming line(PFL) in Institute of Fluid Physics, China Academy of Engineering Physics. The experime...
The solid-state pulsed power device is a new development trend of pulsed power technology. This paper reports the development of the solid-state pulse forming line(PFL) in Institute of Fluid Physics, China Academy of Engineering Physics. The experime...
2011,
23.
Abstract:
Two kinds of Photoconductive semiconductor switch(PCSSs) with bulk structure are studied experimentally, which are fabricated from semi-insulating GaAs. The first switch has a size of 10 mm×10 mm×0.6 mm, whose electrodes are 6 mm in diameter on the o...
Two kinds of Photoconductive semiconductor switch(PCSSs) with bulk structure are studied experimentally, which are fabricated from semi-insulating GaAs. The first switch has a size of 10 mm×10 mm×0.6 mm, whose electrodes are 6 mm in diameter on the o...
2011,
23.
Abstract:
This paper proposes a series resonant converter based on HF (high-frequency) AC-link technology, and gives the analysis of its working principle and working process, as well as the control method and system block diagram. Simulation and experiment wa...
This paper proposes a series resonant converter based on HF (high-frequency) AC-link technology, and gives the analysis of its working principle and working process, as well as the control method and system block diagram. Simulation and experiment wa...
2011,
23.
Abstract:
The design goals of a 20 GW/100 Hz repetitive pulsed accelerator are: output power exceeding 20 GW, pulse width about 40 ns, and repetition rate ranging from 1 to 100 Hz. General design of the device based on Tesla technology is described in this pap...
The design goals of a 20 GW/100 Hz repetitive pulsed accelerator are: output power exceeding 20 GW, pulse width about 40 ns, and repetition rate ranging from 1 to 100 Hz. General design of the device based on Tesla technology is described in this pap...
2011,
23.
Abstract:
A compact wideband impulse radiating generator directly driven by a fast rise-time Marx generator is designed. Low-inductance capacitors of 3 300 pF are chosen as energy storage capacitors, and helix inductors are utilized as charging and grounding e...
A compact wideband impulse radiating generator directly driven by a fast rise-time Marx generator is designed. Low-inductance capacitors of 3 300 pF are chosen as energy storage capacitors, and helix inductors are utilized as charging and grounding e...
2011,
23.
Abstract:
The paper presents the principle of the charging technology for nanosecond transmission line, and designs an experimental setup for high power ultra-wideband pulse generation accordingly. The working process of the experimental setup is studied by si...
The paper presents the principle of the charging technology for nanosecond transmission line, and designs an experimental setup for high power ultra-wideband pulse generation accordingly. The working process of the experimental setup is studied by si...
2011,
23.
Abstract:
The theoretical analysis shows that the interlayer voltage of magnetic core is directly proportional to the tape thickness and width along with the working voltage of magnetic core, while inversely proportional to the effective cross-sectional area o...
The theoretical analysis shows that the interlayer voltage of magnetic core is directly proportional to the tape thickness and width along with the working voltage of magnetic core, while inversely proportional to the effective cross-sectional area o...
2011,
23.
Abstract:
A pulse-forming line with three conductor coaxial-line and Tesla transformer is presented. The electric field distribution between inner and outer conductors is improved and the average field intensity is increased by using the middle conductor, thus...
A pulse-forming line with three conductor coaxial-line and Tesla transformer is presented. The electric field distribution between inner and outer conductors is improved and the average field intensity is increased by using the middle conductor, thus...
2011,
23.
Abstract:
A wideband radiation system with tunable center frequency is presented. The system is composed of a pulsed power source, a λ/4 coaxial transmission line oscillator, a ring switch, a coupler and a radiation antenna. The resonant frequency of the oscil...
A wideband radiation system with tunable center frequency is presented. The system is composed of a pulsed power source, a λ/4 coaxial transmission line oscillator, a ring switch, a coupler and a radiation antenna. The resonant frequency of the oscil...
2011,
23.
Abstract:
The paper designs a high power ultra-wideband(UWB) radiation source, which consists of high voltage pulsed power supply, pulse forming line, impedance transformation unit, transmission line, etc. The parameters of all the parts are analyzed and match...
The paper designs a high power ultra-wideband(UWB) radiation source, which consists of high voltage pulsed power supply, pulse forming line, impedance transformation unit, transmission line, etc. The parameters of all the parts are analyzed and match...
2011,
23.
Abstract:
The paper analyzes the reason why the pulse top spreads and the rise time shortens in a fault experiment on long pulse high power linear transformer microwave driver. Effects of waves superposition delay are discussed based on current transmission mo...
The paper analyzes the reason why the pulse top spreads and the rise time shortens in a fault experiment on long pulse high power linear transformer microwave driver. Effects of waves superposition delay are discussed based on current transmission mo...
2011,
23.
Abstract:
This paper presents a long-pulse modulator based on parallel resonant waveform superposition technique, which uses multiple modules (in parallel) for waveform superposition to reduce rising edge while keep a certain voltage ripple and increase the ou...
This paper presents a long-pulse modulator based on parallel resonant waveform superposition technique, which uses multiple modules (in parallel) for waveform superposition to reduce rising edge while keep a certain voltage ripple and increase the ou...
2011,
23.
Abstract:
Effects of impedance discontinuity in magnetically insulated transmission line(MITL) region and diode time-dependent impedance on diode wave process have been studied through theoretical analysis. If the time delay of the transmission lines in MITL r...
Effects of impedance discontinuity in magnetically insulated transmission line(MITL) region and diode time-dependent impedance on diode wave process have been studied through theoretical analysis. If the time delay of the transmission lines in MITL r...
2011,
23.
Abstract:
The electrohydrodynamic equation of bubble deformation in liquid was derived based on the ellipsoid model of bubble breakdown in liquid. With the software Comsol being used to track the bubble deformation, the impact of air bubble deformation in diel...
The electrohydrodynamic equation of bubble deformation in liquid was derived based on the ellipsoid model of bubble breakdown in liquid. With the software Comsol being used to track the bubble deformation, the impact of air bubble deformation in diel...
2011,
23.
Abstract:
Experimental research on synchronized operation of 4 parallel-connected 1 GW nanosecond pulse generators is presented. With trigatron as trigger switch, the synchronized operation is successfully achieved. The jitter time of trigation is 0.2 ns. The ...
Experimental research on synchronized operation of 4 parallel-connected 1 GW nanosecond pulse generators is presented. With trigatron as trigger switch, the synchronized operation is successfully achieved. The jitter time of trigation is 0.2 ns. The ...
2011,
23.
Abstract:
This paper presented the particle-in-cell simulations on the expansion process of the plasma with a density about 1014 cm-3 near the cathode surface. The plasma expanding with velocity about 1 cm/μs was observed. The expansion process was analyzed ba...
This paper presented the particle-in-cell simulations on the expansion process of the plasma with a density about 1014 cm-3 near the cathode surface. The plasma expanding with velocity about 1 cm/μs was observed. The expansion process was analyzed ba...
2011,
23.
Abstract:
A tri-electrode self-steepening switch was researched. Then a triggering system was designed with a transformer driver and the self-steepening switch to satisfy the requirements of the trigatron. Statistical analysis on steepening parameters of the s...
A tri-electrode self-steepening switch was researched. Then a triggering system was designed with a transformer driver and the self-steepening switch to satisfy the requirements of the trigatron. Statistical analysis on steepening parameters of the s...
2011,
23.
Abstract:
Taking a Tesla transformer as a pulsed power source, the insulation recovery characteristics of a 4 mm-gap length, 4 MPa-pressure N2 switch are researched with two-pulse method. The material of the switch is copper and the shape is circular. The resu...
Taking a Tesla transformer as a pulsed power source, the insulation recovery characteristics of a 4 mm-gap length, 4 MPa-pressure N2 switch are researched with two-pulse method. The material of the switch is copper and the shape is circular. The resu...
2011,
23.
Abstract:
The paper studies the higher order parasitic mode oscillation in input cavity and idler cavity of relativistic klystron amplifier(RKA). The parasitic mode in resonant cavity is proved to be TM11 mode, which is transformed into TE11 mode in drift tube...
The paper studies the higher order parasitic mode oscillation in input cavity and idler cavity of relativistic klystron amplifier(RKA). The parasitic mode in resonant cavity is proved to be TM11 mode, which is transformed into TE11 mode in drift tube...
2011,
23.
Abstract:
Based on Open object libraries, an open-source library for computer aided geometry design (CAGD), the technique of complex geometry modeling and conformal grid generation used for fully electromagnetic particle simulation is given. The characteristic...
Based on Open object libraries, an open-source library for computer aided geometry design (CAGD), the technique of complex geometry modeling and conformal grid generation used for fully electromagnetic particle simulation is given. The characteristic...
2011,
23.
Abstract:
NEPTUNE is a three-dimensional fully parallel electromagnetic code to solve electromagnetic problem in high power microwave(HPM) devices with complex geometry. This paper introduces the following three parallelization methods used in the code. For ma...
NEPTUNE is a three-dimensional fully parallel electromagnetic code to solve electromagnetic problem in high power microwave(HPM) devices with complex geometry. This paper introduces the following three parallelization methods used in the code. For ma...
2011,
23.
Abstract:
In this article, the parallel performance test of JEMS- FDTD on MPP(Massively Parallel Processor) is introduced, including the performance of different patch size, single- node and multi- node MPI/OPENMP hybrid parallel performance, and large scale p...
In this article, the parallel performance test of JEMS- FDTD on MPP(Massively Parallel Processor) is introduced, including the performance of different patch size, single- node and multi- node MPI/OPENMP hybrid parallel performance, and large scale p...
2011,
23.
Abstract:
According to the structural and feeding characteristics of beam waveguide system, the physical model for the excitation, transmission and radiation problems in beam waveguide with arbitrary shape is set up by using the volume-surface integral equatio...
According to the structural and feeding characteristics of beam waveguide system, the physical model for the excitation, transmission and radiation problems in beam waveguide with arbitrary shape is set up by using the volume-surface integral equatio...
2011,
23.
Abstract:
This paper researches the high frequency characteristics of coaxial boundary-loaded resonator with three cavities.It adopts the Borgnis potential function in cylindrical coordinate system to solve the field expression in each region, and then uses bo...
This paper researches the high frequency characteristics of coaxial boundary-loaded resonator with three cavities.It adopts the Borgnis potential function in cylindrical coordinate system to solve the field expression in each region, and then uses bo...
2011,
23.
Abstract:
This paper studies the method of source stirring, especially using multiple sources to improve the field uniformity in reverberation chambers (RCs). Firstly, the factors that may affect the field distribution in RCs are summarized, according to the M...
This paper studies the method of source stirring, especially using multiple sources to improve the field uniformity in reverberation chambers (RCs). Firstly, the factors that may affect the field distribution in RCs are summarized, according to the M...
2011,
23.
Abstract:
The paper describes the explosion electron emission resulted from microwave radiation field in microwave tube, including the analysis of alternating field-emission and the temperature distribution on the whisker. The deduced equation provides the hea...
The paper describes the explosion electron emission resulted from microwave radiation field in microwave tube, including the analysis of alternating field-emission and the temperature distribution on the whisker. The deduced equation provides the hea...
2011,
23.
Abstract:
A high power passive limiter based on PIN diode is presented. The main factors affecting its performance, such as power capability, limiting levels, peak leaking, response time, and recovery time, are presented. A passive PIN limiter using Schottky d...
A high power passive limiter based on PIN diode is presented. The main factors affecting its performance, such as power capability, limiting levels, peak leaking, response time, and recovery time, are presented. A passive PIN limiter using Schottky d...
2011,
23.
Abstract:
The paper studies the structure, electron beam parameters and beam-wave interaction of a complex cavity with gradual transition employed in the 94 GHz gyrotron. A self-consistent field nonlinear theoretical analysis is used and numerical simulation r...
The paper studies the structure, electron beam parameters and beam-wave interaction of a complex cavity with gradual transition employed in the 94 GHz gyrotron. A self-consistent field nonlinear theoretical analysis is used and numerical simulation r...
2011,
23.
Abstract:
A W-band fundamental harmonic continuous wave single-cavity gyrotron oscillator with the operating mode TE02 has been designed according to the electron cyclotron maser theory of gyrotron with self-consistent nonlinear beam-wave interaction code. The...
A W-band fundamental harmonic continuous wave single-cavity gyrotron oscillator with the operating mode TE02 has been designed according to the electron cyclotron maser theory of gyrotron with self-consistent nonlinear beam-wave interaction code. The...
2011,
23.
Abstract:
Based on a relativistic magnetron(RM) which has six different cavities, a three-strip transparent cathode has been designed and fabricated to improve the output characteristics of the RM. Computer simulation and laboratory tests are used to compare o...
Based on a relativistic magnetron(RM) which has six different cavities, a three-strip transparent cathode has been designed and fabricated to improve the output characteristics of the RM. Computer simulation and laboratory tests are used to compare o...
2011,
23.
Abstract:
The article introduces the test of beam cross-section, focusing field and transmission rate of sheet beam klystron with Wiggler focusing. Characteristics of Wiggler focusing are analyzed and the test method of improving the transmission rate is obtai...
The article introduces the test of beam cross-section, focusing field and transmission rate of sheet beam klystron with Wiggler focusing. Characteristics of Wiggler focusing are analyzed and the test method of improving the transmission rate is obtai...
2011,
23.
Abstract:
A Ku-band magnetically insulated transmission line oscillator(MILO) is put forward with the theoretical analysis according to dispersion characteristics of slow wave structure. Compared with common MILOs, the Ku-band MILO designed has a choke cavity ...
A Ku-band magnetically insulated transmission line oscillator(MILO) is put forward with the theoretical analysis according to dispersion characteristics of slow wave structure. Compared with common MILOs, the Ku-band MILO designed has a choke cavity ...
2011,
23.
Abstract:
A high power millimeter wave generator has been investigated and improved by particle in cell(PIC) simulations and experiments. Overmoded slow wave structures(SWSs) were adopted to increase power capacity. In order to realize single mode and single f...
A high power millimeter wave generator has been investigated and improved by particle in cell(PIC) simulations and experiments. Overmoded slow wave structures(SWSs) were adopted to increase power capacity. In order to realize single mode and single f...
2011,
23.
Abstract:
With the increase in frequency, the output gain and bandwidth of microwave vacuum devices are subject to considerable limitations, which may be solved by extended interaction klystron. With the same working principle as high-power klystron’s, the ext...
With the increase in frequency, the output gain and bandwidth of microwave vacuum devices are subject to considerable limitations, which may be solved by extended interaction klystron. With the same working principle as high-power klystron’s, the ext...
2011,
23.
Abstract:
A moderate-energy P-band relativistic backward wave oscillator (RBWO) is proposed and investigated by using the 2.5D fully electromagnetic particle-in-cell code, KARAT. A double corrugated configuration is designed in the coaxial slow wave structure ...
A moderate-energy P-band relativistic backward wave oscillator (RBWO) is proposed and investigated by using the 2.5D fully electromagnetic particle-in-cell code, KARAT. A double corrugated configuration is designed in the coaxial slow wave structure ...
2011,
23.
Abstract:
For a traditional collector of an S-band backward-wave oscillator, the affected area due to bombardment by energetic electrons was experimentally measured, and the power per unit area as thermal loading for a 700 keV and 7 kA beam with 50 ns duration...
For a traditional collector of an S-band backward-wave oscillator, the affected area due to bombardment by energetic electrons was experimentally measured, and the power per unit area as thermal loading for a 700 keV and 7 kA beam with 50 ns duration...
2011,
23.
Abstract:
This paper analyzes and simulates the RF breakdown in relativistic backward wave oscillator(RBWO). The RF breakdown which occurs on the surface of resonant reflector and slow wave structure(SWS) is induced by field emission. A method is proposed for ...
This paper analyzes and simulates the RF breakdown in relativistic backward wave oscillator(RBWO). The RF breakdown which occurs on the surface of resonant reflector and slow wave structure(SWS) is induced by field emission. A method is proposed for ...
2011,
23.
Abstract:
A modified helically corrugated waveguide was investigated for passive pulse compression with high gain and high efficiency, and its loss coefficient was obtained by employing the method of perturbation of Maxwell’s equations. According to the disper...
A modified helically corrugated waveguide was investigated for passive pulse compression with high gain and high efficiency, and its loss coefficient was obtained by employing the method of perturbation of Maxwell’s equations. According to the disper...
2011,
23.
Abstract:
The paper proposes a coupling probe which can effectively expand the coupling adjustment range, and optimally designs a 64-element array antenna’s rectangular radial line feed network at the center frequency of 2.1 GHz. Simulation results show that t...
The paper proposes a coupling probe which can effectively expand the coupling adjustment range, and optimally designs a 64-element array antenna’s rectangular radial line feed network at the center frequency of 2.1 GHz. Simulation results show that t...
2011,
23.
Abstract:
Considering region segmentation, message transmission, load balancing, synchronization, etc, the paper presents a parallel finite-difference time-domain algorithm to calculate the electromagnetic scattering at randomly rough surface and applies the a...
Considering region segmentation, message transmission, load balancing, synchronization, etc, the paper presents a parallel finite-difference time-domain algorithm to calculate the electromagnetic scattering at randomly rough surface and applies the a...
2011,
23.
Abstract:
The eigenequation of coaxial waveguide with inner and outer slotted structure is derived using the fields matching method, and the outer slotted cylindrical waveguide eigenequation is derived as well. Numerical simulation is conducted on the propagat...
The eigenequation of coaxial waveguide with inner and outer slotted structure is derived using the fields matching method, and the outer slotted cylindrical waveguide eigenequation is derived as well. Numerical simulation is conducted on the propagat...
2011,
23.
Abstract:
A kind of high power microwave mode converter is designed, which is lowly over-moded with input and output wave-ports perpendicular to each other. The converter can convert TM01 mode in a circular waveguide to TE10 mode in a rectangular waveguide, an...
A kind of high power microwave mode converter is designed, which is lowly over-moded with input and output wave-ports perpendicular to each other. The converter can convert TM01 mode in a circular waveguide to TE10 mode in a rectangular waveguide, an...
2011,
23.
Abstract:
The array antenna control system uses real-time operation system VxWorks, and the control system computer communicates with the unit antenna through peripheral component interconnect(PCI) device. This paper develops a PCI device driver based on VxWor...
The array antenna control system uses real-time operation system VxWorks, and the control system computer communicates with the unit antenna through peripheral component interconnect(PCI) device. This paper develops a PCI device driver based on VxWor...
2011,
23.
Abstract:
The paper developed a high-power microwave ultra-wideband coaxial rotary joint, and made some experimental study on its mechanical characteristics, temperature adaptability, transmission efficiency and power capability. The joint can work normally in...
The paper developed a high-power microwave ultra-wideband coaxial rotary joint, and made some experimental study on its mechanical characteristics, temperature adaptability, transmission efficiency and power capability. The joint can work normally in...
2011,
23.
Abstract:
This article uses VHDL to design a stepping motor control IP core based on FPGA which has been compiled and simulated in Quartus Ⅱ. This core calculates control parameters online, enabling every motor in the array to figure out its velocity profile a...
This article uses VHDL to design a stepping motor control IP core based on FPGA which has been compiled and simulated in Quartus Ⅱ. This core calculates control parameters online, enabling every motor in the array to figure out its velocity profile a...
2011,
23.
Abstract:
The paper proposes a conformal equiangular spiral antenna on the circularly truncated cone with electromagnetic band-gap structure(EAS-EBG antenna), which shows wideband characteristics with respect to the gain. Firstly, a conformal equiangular spira...
The paper proposes a conformal equiangular spiral antenna on the circularly truncated cone with electromagnetic band-gap structure(EAS-EBG antenna), which shows wideband characteristics with respect to the gain. Firstly, a conformal equiangular spira...
2011,
23.
Abstract:
The paper conducts the 3D simulation of microwave pulses propagating, reflecting and transmitting in a building, to analyze the distribution of the maximum value of electric field in time domain. For narrow-band modulated square pulses with different...
The paper conducts the 3D simulation of microwave pulses propagating, reflecting and transmitting in a building, to analyze the distribution of the maximum value of electric field in time domain. For narrow-band modulated square pulses with different...
2011,
23.
Abstract:
The analysis code for quasi-optical mode converter is developed based on the theory of vector diffraction and the self-adapted Katsenelenbaum-Semenov algorithm for phase correcting. A 3 mm-band quasi-optical mode converter (TE62 to TEM00) is then opt...
The analysis code for quasi-optical mode converter is developed based on the theory of vector diffraction and the self-adapted Katsenelenbaum-Semenov algorithm for phase correcting. A 3 mm-band quasi-optical mode converter (TE62 to TEM00) is then opt...
2011,
23.
Abstract:
Scattering characteristics of reflex metal grating are analyzed according to mode-matching method and space Floquet mode theory. Rectangular metal gratings are designed and optimized. The optimized double U-shaped gratings’ bandwidth is three times t...
Scattering characteristics of reflex metal grating are analyzed according to mode-matching method and space Floquet mode theory. Rectangular metal gratings are designed and optimized. The optimized double U-shaped gratings’ bandwidth is three times t...
2011,
23.
Abstract:
Based on mode coupling theory, coupling coefficients of TEM coaxial waveguide mode to TE11 mode have been derived theoretically, and the design of coaxial waveguide bend for transmitting TE11 mode is reported. The computer simulation via commercial s...
Based on mode coupling theory, coupling coefficients of TEM coaxial waveguide mode to TE11 mode have been derived theoretically, and the design of coaxial waveguide bend for transmitting TE11 mode is reported. The computer simulation via commercial s...
2011,
23.
Abstract:
The scattering properties and regularity of high power microwave propagation on the jungle-ground are analyzed with finite difference time domain (FDTD) method. The scattering properties at different incident angles are obtained, and the relationship...
The scattering properties and regularity of high power microwave propagation on the jungle-ground are analyzed with finite difference time domain (FDTD) method. The scattering properties at different incident angles are obtained, and the relationship...
2011,
23.
Abstract:
In order to achieve beam scanning of mechanical phased array antenna, the brushed DC motor (BDCM) is adopted to drive a helical antenna element to rotate to a predetermined radiation phase. The paper uses the digital signal processor (DSP) TMS320F281...
In order to achieve beam scanning of mechanical phased array antenna, the brushed DC motor (BDCM) is adopted to drive a helical antenna element to rotate to a predetermined radiation phase. The paper uses the digital signal processor (DSP) TMS320F281...
2011,
23.
Abstract:
Two improvements in the iteration method for mode converter design are presented, i.e. a reasonable initial step value in every iteration is given and coupled lines of less contribution are ignored to improve bandwidth. A TE01-TE11 mode converter is ...
Two improvements in the iteration method for mode converter design are presented, i.e. a reasonable initial step value in every iteration is given and coupled lines of less contribution are ignored to improve bandwidth. A TE01-TE11 mode converter is ...
2011,
23.
Abstract:
The paper analyzes the response equation of TEM horn to Gaussian pulse based on the theory of transmission line. The dependence of TEM horn’s response on its open angle is numerically studied under the excitation of Gaussian pulse and its differentia...
The paper analyzes the response equation of TEM horn to Gaussian pulse based on the theory of transmission line. The dependence of TEM horn’s response on its open angle is numerically studied under the excitation of Gaussian pulse and its differentia...
Characteristics of pyramidal horn used in high power microwave radiation field measurement at X-band
2011,
23.
Abstract:
The gain of pyramidal horns with different configurations was simulated and the high power microwave(HPM) measurement antenna with low gain was selected accordingly. The numerical simulation and experiment were carried out on the pyramidal horn’s pul...
The gain of pyramidal horns with different configurations was simulated and the high power microwave(HPM) measurement antenna with low gain was selected accordingly. The numerical simulation and experiment were carried out on the pyramidal horn’s pul...
2011,
23.
Abstract:
The paper studied the array method for the measurement of X-Band high power microwave(HPM) feed total radiation power. The radiation field of an X-band HPM feed was simulated to determine three key parameters of surface integral method, and the measu...
The paper studied the array method for the measurement of X-Band high power microwave(HPM) feed total radiation power. The radiation field of an X-band HPM feed was simulated to determine three key parameters of surface integral method, and the measu...
